A Wide Range (0.32° to 177.6°), Multi-angle Light Scattering Setup and Concomitant Analysis Method
Prakash Gautam, CHRISTOPHER M. SORENSEN,
Kansas State University Abstract Number: 578
Working Group: Nanoparticles and Materials Synthesis
AbstractWe describe a laboratory light scattering apparatus for aerosols covering the scattering angle range 0.32° ≤ θ ≤ 177.6°, involving 46 angles. Two multi-channel detectors are used for nearly simultaneous detection at all angles. Given some extremely small angles, analysis of the data from this device requires Q-space analysis which provides a geometric perspective using the logarithm of the independent scattering variable, the scattering wave vector, q. On the other hand, with the extreme large angles, the scattered intensity is best viewed by plotting linearly versus the independent variable, the scattering angle, θ. Thus, the data obtained from our setup is plotted both logarithmically in Q-space and linearly in θ-space. The combined methods yield a comprehensive description of the scattering. See: Rev. Sci. Instrum. 92, 113105 (2021); https://doi.org/10.1063/5.0068318.